更新 function.py
Gitea Actions Experiment Test / Experiment-Actions (push) Successful in 11s

This commit is contained in:
2024-10-29 07:48:23 +08:00
parent c4162c264c
commit c408fbace3
+30 -3
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@@ -21,12 +21,12 @@ import numpy as np
"""
请在这里填写学号和姓名,不填写即成绩无效。
"""
id = "202210423xxx"
name = "test_name"
id = "202210423217"
name = "吴俊煯"
# 这里写自己的代码实现
def train_logreg(X, y, other_params="你自己设置一些其它参数"):
def train_logreg(X, y, learning_rate=0.01, iterations=1000):
"""
对率回归训练函数。
@@ -38,7 +38,23 @@ def train_logreg(X, y, other_params="你自己设置一些其它参数"):
Returns:
- numpy array: 训练得到的权重。
"""
m, n = X.shape
weights = np.zeros(n)
bias = 0
for _ in range(iterations):
for idx, x_i in enumerate(X):
linear_output = np.dot(x_i, weights) + bias
y_predicted = 1 / (1 + np.exp(-linear_output))
# 计算误差
error = y[idx] - y_predicted
# 更新权重和偏置
weights += learning_rate * error * x_i
bias += learning_rate * error
return weights
def predict_logreg(inX, weights):
"""
@@ -51,7 +67,11 @@ def predict_logreg(inX, weights):
Returns:
- int: 预测的分类标签。
"""
linear_output = np.dot(inX, weights)
y_predicted = 1 / (1 + np.exp(-linear_output))
# 将输出转换为分类标签
return 1 if y_predicted >= 0.5 else 0
# 这里也写自己的代码实现
def load_data(filepath):
@@ -65,7 +85,14 @@ def load_data(filepath):
- np.array: 特征数据。
- np.array: 标签数据。
"""
data = np.loadtxt(filepath, delimiter=',')
X = data[:, :-1]
y = data[:, -1]
# 将标签转换为0和1(假设原始标签为1和2)
y = np.where(y == 1, 0, 1)
return X, y
if __name__ == "__main__":
# 以下代码可用于测试,可自行随意修改